bugfix: prime tower fixes maybe: insets
bugfix: prime tower fixes maybe: insets

patrick3coffee/CuraTinyG,ROBO3D/CuraEngine,Ultimaker/CuraEngine,Ultimaker/CuraEngine,alephobjects/CuraEngine,markwal/CuraEngine,fxtentacle/CuraEngine,uus169/CuraEngine,totalretribution/CuraEngine,markwal/CuraEngine,patrick3coffee/CuraTinyG,mspark93/CuraEngine,uus169/CuraEngine,patrick3coffee/CuraTinyG,mspark93/CuraEngine,pratikshashroff/pcura,alex1818/CuraEngine,alex1818/CuraEngine,alephobjects/CuraEngine,markwal/CuraEngine,pratikshashroff/pcura,alephobjects/CuraEngine,ROBO3D/CuraEngine,totalretribution/CuraEngine,fxtentacle/CuraEngine,fxtentacle/CuraEngine,mspark93/CuraEngine,uus169/CuraEngine,totalretribution/CuraEngine,ROBO3D/CuraEngine,pratikshashroff/pcura,alex1818/CuraEngine